SEMPERIT 4SH Hydraulic Hoses  

High-pressure 4-wire spiral hoses for heavy-duty power hydraulics

The SEMPERIT 4SH hydraulic hose category in the HYDRON online store includes top-class ultra-high-pressure four-wire spiral hoses by Semperit, manufactured in accordance with the European EN 856 4SH standard and the international ISO 3862-1 4SH standard. Hoses from this group are designed for use in the most demanding power hydraulic systems featuring extreme operating pressures, intense pressure spikes, and high dynamic loads.

The hose construction is based on four high-tensile steel wire spirals, precisely embedded between layers of oil-resistant synthetic rubber. Semperit 4SH hoses are designed for external and internal skiving in the crimping zone, which guarantees full mechanical anchoring of the ferrule on the steel reinforcement and eliminates the risk of the fitting blowing off during operation.

Key advantages and construction properties of SEMPERIT 4SH hoses

Semperit 4SH series hydraulic hoses are distinguished by excellent technical specifications adapted for operation in the most difficult conditions:

• Four-layer spiral steel reinforcement: Four densely wound high-tensile steel wire spirals prevent hose swelling and protect the installation against shocks and pressure pulsation.
• Extreme working pressures and high safety margin: The hoses operate at pressures ranging from 250 bar for large diameters up to 420 bar for smaller cross-sections, maintaining a fourfold safety factor against bursting (burst pressure reaches up to 1680 bar).
• Resistance of the external cover to abrasion and weather conditions: The outer layer of synthetic rubber shows increased resistance to abrasion, ozone, UV radiation, and machine body fluids.
• Wide range of operating temperatures: The hoses maintain structural stability and flexibility in a temperature range from -40°C to +100°C, and momentarily even up to +120°C.
• Assembly in the skive system: Removing the rubber cover before crimping guarantees direct contact between the ferrule metal and the steel spiral, which completely eliminates the possibility of leakage under load.

Summary of 4SH hose sizes and pressure parameters

The HYDRON store offer includes a full range of SEMPERIT 4SH hose diameters adapted to various installation requirements:

• Semperit 4SH DN20 (3/4"): working pressure 420 bar, burst pressure 1680 bar.
• Semperit 4SH DN25 (1"): working pressure 380 bar, burst pressure 1520 bar.
• Semperit 4SH DN32 (1.1/4"): working pressure 350 bar, burst pressure 1400 bar.
• Semperit 4SH DN40 (1.1/2"): working pressure 290 bar.
• Semperit 4SH DN50 (2"): working pressure 250 bar.

Hoses are available for sale by the meter with a custom cutting option, as well as in full factory rolls (e.g., 20 m or 40 m).

Application of Semperit 4SH hoses in machinery and industry

SEMPERIT 4SH hydraulic hoses are used wherever standard 2SN / 2SC two-wire hoses do not provide a sufficient pressure margin. They are used in heavy construction machinery (crawler excavators, loaders), forestry equipment (harvesters, forwarders), high-power agricultural machinery, mining equipment, drilling rigs, and stationary hydraulic presses.

Frequently Asked Questions (FAQ)

Why do SEMPERIT 4SH hydraulic hoses require skiving before crimping?

Skiving involves removing the outer and inner rubber layers in the ferrule mounting area. Thanks to this, the metal teeth of the ferrule bite directly into the steel spiral reinforcement, creating an inseparable mechanical lock resistant to pressures reaching 420 bar.

What fittings and ferrules should be used for Semperit 4SH hoses?

For 4SH hoses, dedicated ferrules designed for skiving (T4SH / Interlock series) and matching fittings with a special locking feature, adapted to carry high dynamic loads, should be used.